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index.js
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// EDtunnel - A Cloudflare Worker-based VLESS Proxy with WebSocket Transport
// @ts-ignore
import { connect } from 'cloudflare:sockets';
// ======================================
// Configuration
// ======================================
/**
* User configuration and settings
* Generate UUID: [Windows] Press "Win + R", input cmd and run: Powershell -NoExit -Command "[guid]::NewGuid()"
*/
let userID = 'd342d11e-d424-4583-b36e-524ab1f0afa4';
/**
* Array of proxy server addresses with ports
* Format: ['hostname:port', 'hostname:port']
*/
const proxyIPs = ['cdn.xn--b6gac.eu.org:443', 'cdn-all.xn--b6gac.eu.org:443'];
// Randomly select a proxy server from the pool
let proxyIP = proxyIPs[Math.floor(Math.random() * proxyIPs.length)];
let proxyPort = proxyIP.includes(':') ? proxyIP.split(':')[1] : '443';
// Alternative configurations:
// Single proxy IP: let proxyIP = 'cdn.xn--b6gac.eu.org';
// IPv6 example: let proxyIP = "[2a01:4f8:c2c:123f:64:5:6810:c55a]"
/**
* SOCKS5 proxy configuration
* Format: 'username:password@host:port' or 'host:port'
*/
let socks5Address = '';
/**
* SOCKS5 relay mode
* When true: All traffic is proxied through SOCKS5
* When false: Only Cloudflare IPs use SOCKS5
*/
let socks5Relay = false;
if (!isValidUUID(userID)) {
throw new Error('uuid is not valid');
}
let parsedSocks5Address = {};
let enableSocks = false;
/**
* Main handler for the Cloudflare Worker. Processes incoming requests and routes them appropriately.
* @param {import("@cloudflare/workers-types").Request} request - The incoming request object
* @param {Object} env - Environment variables containing configuration
* @param {string} env.UUID - User ID for authentication
* @param {string} env.PROXYIP - Proxy server IP address
* @param {string} env.SOCKS5 - SOCKS5 proxy configuration
* @param {string} env.SOCKS5_RELAY - SOCKS5 relay mode flag
* @returns {Promise<Response>} Response object
*/
export default {
/**
* @param {import("@cloudflare/workers-types").Request} request
* @param {{UUID: string, PROXYIP: string, SOCKS5: string, SOCKS5_RELAY: string}} env
* @param {import("@cloudflare/workers-types").ExecutionContext} _ctx
* @returns {Promise<Response>}
*/
async fetch(request, env, _ctx) {
try {
const { UUID, PROXYIP, SOCKS5, SOCKS5_RELAY } = env;
userID = UUID || userID;
socks5Address = SOCKS5 || socks5Address;
socks5Relay = SOCKS5_RELAY || socks5Relay;
// Handle proxy configuration
const proxyConfig = handleProxyConfig(PROXYIP);
proxyIP = proxyConfig.ip;
proxyPort = proxyConfig.port;
if (socks5Address) {
try {
const selectedSocks5 = selectRandomAddress(socks5Address);
parsedSocks5Address = socks5AddressParser(selectedSocks5);
enableSocks = true;
} catch (err) {
console.log(err.toString());
enableSocks = false;
}
}
const userIDs = userID.includes(',') ? userID.split(',').map(id => id.trim()) : [userID];
const url = new URL(request.url);
const host = request.headers.get('Host');
const requestedPath = url.pathname.substring(1); // Remove leading slash
const matchingUserID = userIDs.length === 1 ?
(requestedPath === userIDs[0] ||
requestedPath === `sub/${userIDs[0]}` ||
requestedPath === `bestip/${userIDs[0]}` ? userIDs[0] : null) :
userIDs.find(id => {
const patterns = [id, `sub/${id}`, `bestip/${id}`];
return patterns.some(pattern => requestedPath.startsWith(pattern));
});
if (request.headers.get('Upgrade') !== 'websocket') {
if (url.pathname === '/cf') {
return new Response(JSON.stringify(request.cf, null, 4), {
status: 200,
headers: { "Content-Type": "application/json;charset=utf-8" },
});
}
if (matchingUserID) {
if (url.pathname === `/${matchingUserID}` || url.pathname === `/sub/${matchingUserID}`) {
const isSubscription = url.pathname.startsWith('/sub/');
const proxyAddresses = PROXYIP ? PROXYIP.split(',').map(addr => addr.trim()) : proxyIP;
const content = isSubscription ?
GenSub(matchingUserID, host, proxyAddresses) :
getConfig(matchingUserID, host, proxyAddresses);
return new Response(content, {
status: 200,
headers: {
"Content-Type": isSubscription ?
"text/plain;charset=utf-8" :
"text/html; charset=utf-8"
},
});
} else if (url.pathname === `/bestip/${matchingUserID}`) {
return fetch(`https://sub.xf.free.hr/auto?host=${host}&uuid=${matchingUserID}&path=/`, { headers: request.headers });
}
}
return handleDefaultPath(url, request);
} else {
return await ProtocolOverWSHandler(request);
}
} catch (err) {
return new Response(err.toString());
}
},
};
/**
* Handles default path requests when no specific route matches.
* Generates and returns a cloud drive interface HTML page.
* @param {URL} url - The URL object of the request
* @param {Request} request - The incoming request object
* @returns {Response} HTML response with cloud drive interface
*/
async function handleDefaultPath(url, request) {
const host = request.headers.get('Host');
const DrivePage = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>${host} - Cloud Drive</title>
<style>
body {
font-family: Arial, sans-serif;
line-height: 1.6;
margin: 0;
padding: 20px;
background-color: #f4f4f4;
}
.container {
max-width: 800px;
margin: auto;
background: white;
padding: 20px;
border-radius: 5px;
box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 {
color: #333;
}
.file-list {
list-style-type: none;
padding: 0;
}
.file-list li {
background: #f9f9f9;
margin-bottom: 10px;
padding: 10px;
border-radius: 3px;
display: flex;
align-items: center;
}
.file-list li:hover {
background: #f0f0f0;
}
.file-icon {
margin-right: 10px;
font-size: 1.2em;
}
.file-link {
text-decoration: none;
color: #0066cc;
flex-grow: 1;
}
.file-link:hover {
text-decoration: underline;
}
.upload-area {
margin-top: 20px;
padding: 40px;
background: #e9e9e9;
border: 2px dashed #aaa;
border-radius: 5px;
text-align: center;
cursor: pointer;
transition: all 0.3s ease;
}
.upload-area:hover, .upload-area.drag-over {
background: #d9d9d9;
border-color: #666;
}
.upload-area h2 {
margin-top: 0;
color: #333;
}
#fileInput {
display: none;
}
.upload-icon {
font-size: 48px;
color: #666;
margin-bottom: 10px;
}
.upload-text {
font-size: 18px;
color: #666;
}
.upload-status {
margin-top: 20px;
font-style: italic;
color: #666;
}
.file-actions {
display: flex;
gap: 10px;
}
.delete-btn {
color: #ff4444;
cursor: pointer;
background: none;
border: none;
padding: 5px;
}
.delete-btn:hover {
color: #ff0000;
}
.clear-all-btn {
background-color: #ff4444;
color: white;
border: none;
padding: 10px 15px;
border-radius: 4px;
cursor: pointer;
margin-bottom: 20px;
}
.clear-all-btn:hover {
background-color: #ff0000;
}
</style>
</head>
<body>
<div class="container">
<h1>Cloud Drive</h1>
<p>Welcome to your personal cloud storage. Here are your uploaded files:</p>
<button id="clearAllBtn" class="clear-all-btn">Clear All Files</button>
<ul id="fileList" class="file-list">
</ul>
<div id="uploadArea" class="upload-area">
<div class="upload-icon">📁</div>
<h2>Upload a File</h2>
<p class="upload-text">Drag and drop a file here or click to select</p>
<input type="file" id="fileInput" hidden>
</div>
<div id="uploadStatus" class="upload-status"></div>
</div>
<script>
function loadFileList() {
const fileList = document.getElementById('fileList');
const savedFiles = JSON.parse(localStorage.getItem('uploadedFiles')) || [];
fileList.innerHTML = '';
savedFiles.forEach((file, index) => {
const li = document.createElement('li');
li.innerHTML = \`
<span class="file-icon">📄</span>
<a href="https://ipfs.io/ipfs/\${file.Url.split('/').pop()}" class="file-link" target="_blank">\${file.Name}</a>
<div class="file-actions">
<button class="delete-btn" onclick="deleteFile(\${index})">
<span class="file-icon">❌</span>
</button>
</div>
\`;
fileList.appendChild(li);
});
}
function deleteFile(index) {
const savedFiles = JSON.parse(localStorage.getItem('uploadedFiles')) || [];
savedFiles.splice(index, 1);
localStorage.setItem('uploadedFiles', JSON.stringify(savedFiles));
loadFileList();
}
document.getElementById('clearAllBtn').addEventListener('click', () => {
if (confirm('Are you sure you want to clear all files?')) {
localStorage.removeItem('uploadedFiles');
loadFileList();
}
});
loadFileList();
const uploadArea = document.getElementById('uploadArea');
const fileInput = document.getElementById('fileInput');
const uploadStatus = document.getElementById('uploadStatus');
uploadArea.addEventListener('dragover', (e) => {
e.preventDefault();
uploadArea.classList.add('drag-over');
});
uploadArea.addEventListener('dragleave', () => {
uploadArea.classList.remove('drag-over');
});
uploadArea.addEventListener('drop', (e) => {
e.preventDefault();
uploadArea.classList.remove('drag-over');
const files = e.dataTransfer.files;
if (files.length) {
handleFileUpload(files[0]);
}
});
uploadArea.addEventListener('click', () => {
fileInput.click();
});
fileInput.addEventListener('change', (e) => {
const file = e.target.files[0];
if (file) {
handleFileUpload(file);
}
});
async function handleFileUpload(file) {
uploadStatus.textContent = \`Uploading: \${file.name}...\`;
const formData = new FormData();
formData.append('file', file);
try {
const response = await fetch('https://app.img2ipfs.org/api/v0/add', {
method: 'POST',
body: formData,
headers: {
'Accept': 'application/json',
},
});
if (!response.ok) {
throw new Error('Upload failed');
}
const result = await response.json();
uploadStatus.textContent = \`File uploaded successfully! IPFS Hash: \${result.Hash}\`;
const savedFiles = JSON.parse(localStorage.getItem('uploadedFiles')) || [];
savedFiles.push(result);
localStorage.setItem('uploadedFiles', JSON.stringify(savedFiles));
loadFileList();
} catch (error) {
console.error('Error:', error);
uploadStatus.textContent = 'Upload failed. Please try again.';
}
}
</script>
</body>
</html>
`;
// 返回伪装的网盘页面
return new Response(DrivePage, {
headers: {
"content-type": "text/html;charset=UTF-8",
},
});
}
/**
* Handles protocol over WebSocket requests by creating a WebSocket pair, accepting the WebSocket connection, and processing the protocol header.
* @param {import("@cloudflare/workers-types").Request} request - The incoming request object
* @returns {Promise<Response>} WebSocket response
*/
async function ProtocolOverWSHandler(request) {
/** @type {import("@cloudflare/workers-types").WebSocket[]} */
// @ts-ignore
const webSocketPair = new WebSocketPair();
const [client, webSocket] = Object.values(webSocketPair);
webSocket.accept();
let address = '';
let portWithRandomLog = '';
const log = (/** @type {string} */ info, /** @type {string | undefined} */ event) => {
console.log(`[${address}:${portWithRandomLog}] ${info}`, event || '');
};
const earlyDataHeader = request.headers.get('sec-websocket-protocol') || '';
const readableWebSocketStream = MakeReadableWebSocketStream(webSocket, earlyDataHeader, log);
/** @type {{ value: import("@cloudflare/workers-types").Socket | null}}*/
let remoteSocketWapper = {
value: null,
};
let isDns = false;
// ws --> remote
readableWebSocketStream.pipeTo(new WritableStream({
async write(chunk, controller) {
if (isDns) {
return await handleDNSQuery(chunk, webSocket, null, log);
}
if (remoteSocketWapper.value) {
const writer = remoteSocketWapper.value.writable.getWriter()
await writer.write(chunk);
writer.releaseLock();
return;
}
const {
hasError,
message,
addressType,
portRemote = 443,
addressRemote = '',
rawDataIndex,
ProtocolVersion = new Uint8Array([0, 0]),
isUDP,
} = ProcessProtocolHeader(chunk, userID);
address = addressRemote;
portWithRandomLog = `${portRemote}--${Math.random()} ${isUDP ? 'udp ' : 'tcp '
} `;
if (hasError) {
// controller.error(message);
throw new Error(message); // cf seems has bug, controller.error will not end stream
}
// Handle UDP connections for DNS (port 53) only
if (isUDP) {
if (portRemote === 53) {
isDns = true;
} else {
throw new Error('UDP proxy is only enabled for DNS (port 53)');
}
return; // Early return after setting isDns or throwing error
}
// ["version", "附加信息长度 N"]
const ProtocolResponseHeader = new Uint8Array([ProtocolVersion[0], 0]);
const rawClientData = chunk.slice(rawDataIndex);
if (isDns) {
return handleDNSQuery(rawClientData, webSocket, ProtocolResponseHeader, log);
}
HandleTCPOutBound(remoteSocketWapper, addressType, addressRemote, portRemote, rawClientData, webSocket, ProtocolResponseHeader, log);
},
close() {
log(`readableWebSocketStream is close`);
},
abort(reason) {
log(`readableWebSocketStream is abort`, JSON.stringify(reason));
},
})).catch((err) => {
log('readableWebSocketStream pipeTo error', err);
});
return new Response(null, {
status: 101,
// @ts-ignore
webSocket: client,
});
}
/**
* Handles outbound TCP connections for the proxy.
* Establishes connection to remote server and manages data flow.
* @param {Socket} remoteSocket - Remote socket connection
* @param {string} addressType - Type of address (IPv4/IPv6)
* @param {string} addressRemote - Remote server address
* @param {number} portRemote - Remote server port
* @param {Uint8Array} rawClientData - Raw data from client
* @param {WebSocket} webSocket - WebSocket connection
* @param {Uint8Array} protocolResponseHeader - Protocol response header
* @param {Function} log - Logging function
*/
async function HandleTCPOutBound(remoteSocket, addressType, addressRemote, portRemote, rawClientData, webSocket, protocolResponseHeader, log,) {
async function connectAndWrite(address, port, socks = false) {
/** @type {import("@cloudflare/workers-types").Socket} */
let tcpSocket;
if (socks5Relay) {
tcpSocket = await socks5Connect(addressType, address, port, log)
} else {
tcpSocket = socks ? await socks5Connect(addressType, address, port, log)
: connect({
hostname: address,
port: port,
});
}
remoteSocket.value = tcpSocket;
log(`connected to ${address}:${port}`);
const writer = tcpSocket.writable.getWriter();
await writer.write(rawClientData); // first write, normal is tls client hello
writer.releaseLock();
return tcpSocket;
}
// if the cf connect tcp socket have no incoming data, we retry to redirect ip
async function retry() {
if (enableSocks) {
tcpSocket = await connectAndWrite(addressRemote, portRemote, true);
} else {
tcpSocket = await connectAndWrite(proxyIP || addressRemote, proxyPort || portRemote, false);
}
// no matter retry success or not, close websocket
tcpSocket.closed.catch(error => {
console.log('retry tcpSocket closed error', error);
}).finally(() => {
safeCloseWebSocket(webSocket);
})
RemoteSocketToWS(tcpSocket, webSocket, protocolResponseHeader, null, log);
}
let tcpSocket = await connectAndWrite(addressRemote, portRemote);
// when remoteSocket is ready, pass to websocket
// remote--> ws
RemoteSocketToWS(tcpSocket, webSocket, protocolResponseHeader, retry, log);
}
/**
* Creates a readable stream from WebSocket server.
* Handles early data and WebSocket messages.
* @param {WebSocket} webSocketServer - WebSocket server instance
* @param {string} earlyDataHeader - Header for early data (0-RTT)
* @param {Function} log - Logging function
* @returns {ReadableStream} Stream of WebSocket data
*/
function MakeReadableWebSocketStream(webSocketServer, earlyDataHeader, log) {
let readableStreamCancel = false;
const stream = new ReadableStream({
start(controller) {
webSocketServer.addEventListener('message', (event) => {
const message = event.data;
controller.enqueue(message);
});
webSocketServer.addEventListener('close', () => {
safeCloseWebSocket(webSocketServer);
controller.close();
});
webSocketServer.addEventListener('error', (err) => {
log('webSocketServer has error');
controller.error(err);
});
const { earlyData, error } = base64ToArrayBuffer(earlyDataHeader);
if (error) {
controller.error(error);
} else if (earlyData) {
controller.enqueue(earlyData);
}
},
pull(_controller) {
// if ws can stop read if stream is full, we can implement backpressure
// https://streams.spec.whatwg.org/#example-rs-push-backpressure
},
cancel(reason) {
log(`ReadableStream was canceled, due to ${reason}`)
readableStreamCancel = true;
safeCloseWebSocket(webSocketServer);
}
});
return stream;
}
/**
* Processes VLESS protocol header.
* Extracts and validates protocol information from buffer.
* @param {ArrayBuffer} protocolBuffer - Buffer containing protocol header
* @param {string} userID - User ID for validation
* @returns {Object} Processed header information
*/
function ProcessProtocolHeader(protocolBuffer, userID) {
if (protocolBuffer.byteLength < 24) {
return { hasError: true, message: 'invalid data' };
}
const dataView = new DataView(protocolBuffer);
const version = dataView.getUint8(0);
const slicedBufferString = stringify(new Uint8Array(protocolBuffer.slice(1, 17)));
const uuids = userID.includes(',') ? userID.split(",") : [userID];
const isValidUser = uuids.some(uuid => slicedBufferString === uuid.trim()) ||
(uuids.length === 1 && slicedBufferString === uuids[0].trim());
console.log(`userID: ${slicedBufferString}`);
if (!isValidUser) {
return { hasError: true, message: 'invalid user' };
}
const optLength = dataView.getUint8(17);
const command = dataView.getUint8(18 + optLength);
if (command !== 1 && command !== 2) {
return { hasError: true, message: `command ${command} is not supported, command 01-tcp,02-udp,03-mux` };
}
const portIndex = 18 + optLength + 1;
const portRemote = dataView.getUint16(portIndex);
const addressType = dataView.getUint8(portIndex + 2);
let addressValue, addressLength, addressValueIndex;
switch (addressType) {
case 1:
addressLength = 4;
addressValueIndex = portIndex + 3;
addressValue = new Uint8Array(protocolBuffer.slice(addressValueIndex, addressValueIndex + addressLength)).join('.');
break;
case 2:
addressLength = dataView.getUint8(portIndex + 3);
addressValueIndex = portIndex + 4;
addressValue = new TextDecoder().decode(protocolBuffer.slice(addressValueIndex, addressValueIndex + addressLength));
break;
case 3:
addressLength = 16;
addressValueIndex = portIndex + 3;
addressValue = Array.from({ length: 8 }, (_, i) => dataView.getUint16(addressValueIndex + i * 2).toString(16)).join(':');
break;
default:
return { hasError: true, message: `invalid addressType: ${addressType}` };
}
if (!addressValue) {
return { hasError: true, message: `addressValue is empty, addressType is ${addressType}` };
}
return {
hasError: false,
addressRemote: addressValue,
addressType,
portRemote,
rawDataIndex: addressValueIndex + addressLength,
protocolVersion: new Uint8Array([version]),
isUDP: command === 2
};
}
/**
* Converts remote socket connection to WebSocket.
* Handles data transfer between socket and WebSocket.
* @param {Socket} remoteSocket - Remote socket connection
* @param {WebSocket} webSocket - WebSocket connection
* @param {ArrayBuffer} protocolResponseHeader - Protocol response header
* @param {Function} retry - Retry function for failed connections
* @param {Function} log - Logging function
*/
async function RemoteSocketToWS(remoteSocket, webSocket, protocolResponseHeader, retry, log) {
let hasIncomingData = false;
try {
await remoteSocket.readable.pipeTo(
new WritableStream({
async write(chunk) {
if (webSocket.readyState !== WS_READY_STATE_OPEN) {
throw new Error('WebSocket is not open');
}
hasIncomingData = true;
if (protocolResponseHeader) {
webSocket.send(await new Blob([protocolResponseHeader, chunk]).arrayBuffer());
protocolResponseHeader = null;
} else {
webSocket.send(chunk);
}
},
close() {
log(`Remote connection readable closed. Had incoming data: ${hasIncomingData}`);
},
abort(reason) {
console.error(`Remote connection readable aborted:`, reason);
},
})
);
} catch (error) {
console.error(`RemoteSocketToWS error:`, error.stack || error);
safeCloseWebSocket(webSocket);
}
if (!hasIncomingData && retry) {
log(`No incoming data, retrying`);
await retry();
}
}
/**
* Converts base64 string to ArrayBuffer.
* @param {string} base64Str - Base64 encoded string
* @returns {Object} Object containing decoded data or error
*/
function base64ToArrayBuffer(base64Str) {
if (!base64Str) {
return { earlyData: null, error: null };
}
try {
// Convert modified Base64 for URL (RFC 4648) to standard Base64
base64Str = base64Str.replace(/-/g, '+').replace(/_/g, '/');
// Decode Base64 string
const binaryStr = atob(base64Str);
// Convert binary string to ArrayBuffer
const buffer = new ArrayBuffer(binaryStr.length);
const view = new Uint8Array(buffer);
for (let i = 0; i < binaryStr.length; i++) {
view[i] = binaryStr.charCodeAt(i);
}
return { earlyData: buffer, error: null };
} catch (error) {
return { earlyData: null, error };
}
}
/**
* Validates UUID format.
* @param {string} uuid - UUID string to validate
* @returns {boolean} True if valid UUID
*/
function isValidUUID(uuid) {
// More precise UUID regex pattern
const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
return uuidRegex.test(uuid);
}
const WS_READY_STATE_OPEN = 1;
const WS_READY_STATE_CLOSING = 2;
/**
* Safely closes WebSocket connection.
* Prevents exceptions during WebSocket closure.
* @param {WebSocket} socket - WebSocket to close
*/
function safeCloseWebSocket(socket) {
try {
if (socket.readyState === WS_READY_STATE_OPEN || socket.readyState === WS_READY_STATE_CLOSING) {
socket.close();
}
} catch (error) {
console.error('safeCloseWebSocket error:', error);
}
}
const byteToHex = Array.from({ length: 256 }, (_, i) => (i + 0x100).toString(16).slice(1));
/**
* Converts byte array to hex string without validation.
* @param {Uint8Array} arr - Byte array to convert
* @param {number} offset - Starting offset
* @returns {string} Hex string
*/
function unsafeStringify(arr, offset = 0) {
return [
byteToHex[arr[offset]],
byteToHex[arr[offset + 1]],
byteToHex[arr[offset + 2]],
byteToHex[arr[offset + 3]],
'-',
byteToHex[arr[offset + 4]],
byteToHex[arr[offset + 5]],
'-',
byteToHex[arr[offset + 6]],
byteToHex[arr[offset + 7]],
'-',
byteToHex[arr[offset + 8]],
byteToHex[arr[offset + 9]],
'-',
byteToHex[arr[offset + 10]],
byteToHex[arr[offset + 11]],
byteToHex[arr[offset + 12]],
byteToHex[arr[offset + 13]],
byteToHex[arr[offset + 14]],
byteToHex[arr[offset + 15]]
].join('').toLowerCase();
}
/**
* Safely converts byte array to hex string with validation.
* @param {Uint8Array} arr - Byte array to convert
* @param {number} offset - Starting offset
* @returns {string} Hex string
*/
function stringify(arr, offset = 0) {
const uuid = unsafeStringify(arr, offset);
if (!isValidUUID(uuid)) {
throw new TypeError("Stringified UUID is invalid");
}
return uuid;
}
/**
* Handles DNS query through UDP.
* Processes DNS requests and forwards them.
* @param {ArrayBuffer} udpChunk - UDP data chunk
* @param {WebSocket} webSocket - WebSocket connection
* @param {ArrayBuffer} protocolResponseHeader - Protocol response header
* @param {Function} log - Logging function
*/
async function handleDNSQuery(udpChunk, webSocket, protocolResponseHeader, log) {
// no matter which DNS server client send, we alwasy use hard code one.
// beacsue someof DNS server is not support DNS over TCP
try {
const dnsServer = '8.8.4.4'; // change to 1.1.1.1 after cf fix connect own ip bug
const dnsPort = 53;
/** @type {ArrayBuffer | null} */
let vlessHeader = protocolResponseHeader;
/** @type {import("@cloudflare/workers-types").Socket} */
const tcpSocket = connect({
hostname: dnsServer,
port: dnsPort,
});
log(`connected to ${dnsServer}:${dnsPort}`);
const writer = tcpSocket.writable.getWriter();
await writer.write(udpChunk);
writer.releaseLock();
await tcpSocket.readable.pipeTo(new WritableStream({
async write(chunk) {
if (webSocket.readyState === WS_READY_STATE_OPEN) {
if (vlessHeader) {
webSocket.send(await new Blob([vlessHeader, chunk]).arrayBuffer());
vlessHeader = null;
} else {
webSocket.send(chunk);
}
}
},
close() {
log(`dns server(${dnsServer}) tcp is close`);
},
abort(reason) {
console.error(`dns server(${dnsServer}) tcp is abort`, reason);
},
}));
} catch (error) {
console.error(
`handleDNSQuery have exception, error: ${error.message}`
);
}
}
/**
* Establishes SOCKS5 proxy connection.
* @param {number} addressType - Type of address
* @param {string} addressRemote - Remote address
* @param {number} portRemote - Remote port
* @param {Function} log - Logging function
* @returns {Promise<Socket>} Connected socket
*/
async function socks5Connect(addressType, addressRemote, portRemote, log) {
const { username, password, hostname, port } = parsedSocks5Address;
// Connect to the SOCKS server
const socket = connect({
hostname,
port,
});
// Request head format (Worker -> Socks Server):
// +----+----------+----------+
// |VER | NMETHODS | METHODS |
// +----+----------+----------+
// | 1 | 1 | 1 to 255 |
// +----+----------+----------+
// https://en.wikipedia.org/wiki/SOCKS#SOCKS5
// For METHODS:
// 0x00 NO AUTHENTICATION REQUIRED
// 0x02 USERNAME/PASSWORD https://datatracker.ietf.org/doc/html/rfc1929
const socksGreeting = new Uint8Array([5, 2, 0, 2]);
const writer = socket.writable.getWriter();
await writer.write(socksGreeting);
log('sent socks greeting');
const reader = socket.readable.getReader();
const encoder = new TextEncoder();
let res = (await reader.read()).value;
// Response format (Socks Server -> Worker):
// +----+--------+
// |VER | METHOD |
// +----+--------+
// | 1 | 1 |
// +----+--------+
if (res[0] !== 0x05) {
log(`socks server version error: ${res[0]} expected: 5`);
return;
}
if (res[1] === 0xff) {
log("no acceptable methods");
return;
}
// if return 0x0502
if (res[1] === 0x02) {
log("socks server needs auth");
if (!username || !password) {
log("please provide username/password");
return;
}
// +----+------+----------+------+----------+
// |VER | ULEN | UNAME | PLEN | PASSWD |
// +----+------+----------+------+----------+
// | 1 | 1 | 1 to 255 | 1 | 1 to 255 |
// +----+------+----------+------+----------+
const authRequest = new Uint8Array([
1,
username.length,
...encoder.encode(username),
password.length,
...encoder.encode(password)
]);
await writer.write(authRequest);
res = (await reader.read()).value;
// expected 0x0100
if (res[0] !== 0x01 || res[1] !== 0x00) {
log("fail to auth socks server");
return;
}
}
// Request data format (Worker -> Socks Server):
// +----+-----+-------+------+----------+----------+
// |VER | CMD | RSV | ATYP | DST.ADDR | DST.PORT |
// +----+-----+-------+------+----------+----------+
// | 1 | 1 | X'00' | 1 | Variable | 2 |
// +----+-----+-------+------+----------+----------+
// ATYP: address type of following address
// 0x01: IPv4 address
// 0x03: Domain name
// 0x04: IPv6 address
// DST.ADDR: desired destination address
// DST.PORT: desired destination port in network octet order
// addressType
// 1--> ipv4 addressLength =4
// 2--> domain name
// 3--> ipv6 addressLength =16
let DSTADDR; // DSTADDR = ATYP + DST.ADDR
switch (addressType) {
case 1:
DSTADDR = new Uint8Array(
[1, ...addressRemote.split('.').map(Number)]
);
break;
case 2:
DSTADDR = new Uint8Array(
[3, addressRemote.length, ...encoder.encode(addressRemote)]
);
break;
case 3:
DSTADDR = new Uint8Array(
[4, ...addressRemote.split(':').flatMap(x => [parseInt(x.slice(0, 2), 16), parseInt(x.slice(2), 16)])]
);
break;
default:
log(`invild addressType is ${addressType}`);
return;
}
const socksRequest = new Uint8Array([5, 1, 0, ...DSTADDR, portRemote >> 8, portRemote & 0xff]);
await writer.write(socksRequest);
log('sent socks request');
res = (await reader.read()).value;
// Response format (Socks Server -> Worker):
// +----+-----+-------+------+----------+----------+
// |VER | REP | RSV | ATYP | BND.ADDR | BND.PORT |
// +----+-----+-------+------+----------+----------+
// | 1 | 1 | X'00' | 1 | Variable | 2 |
// +----+-----+-------+------+----------+----------+
if (res[1] === 0x00) {
log("socks connection opened");
} else {
log("fail to open socks connection");